Geochemistry of the Water-Rock System of Weak Hydro-Radon Occurrence «inskiye Springs» (South of Western Siberia)

Novikov, Dmitry A.; Vakulenko, L.G.; Сухорукова, Анна Федоровна

doi:10.31554/978-5-7925-0584-1-2020-88-92

Water-Rock Interaction: Geological Evolution 2020

DOI: 10.31554/978-5-7925-0584-1-2020-88-92

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Geochemistry of the Water-Rock System of Weak Hydro-Radon Occurrence «inskiye Springs» (South of Western Siberia)

Dmitry A. Novikov¹,

L.G. Vakulenko²,

Анна Федоровна Сухорукова³

Abstract: Вмещающие породы представлены глинистыми сланцами темно-серого (до черного), иногда серого цвета, с небольшой примесью алевритового, песчано-алевритового материала. Изотопный состав кальцита вмещающих пород характеризуется близкими значениями: δ 13 C варьирует от-3,1 до-2,7 ‰, δ 18 O-от 17,2 до 18,4 ‰. Выветрелые глинистые сланцы характеризуются облегчением по δ 13 C (до-11,0‰), так и по δ 18 O (до 13,9‰). Также эти образцы по результатам геохимических исследований характеризуется существенным снижением (в нес… Show more

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2021

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Cited by 3 publications

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Isotope-hydrogeochemical features of the Belokurikha field radon waters

Хващевская¹,

Копылова²,

Novikov³

et al. 2021

jour

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The purpose of the work is to carry out integrated isotope-geochemical studies of the mineral waters of the Belokurikha deposit. The methods of titrimetry, ion chromatography, inductively coupled plasma mass spectrometry (ICPMS) have been used in the laboratory investigation of the chemical composition of waters. The isotope composition of oxygen, hydrogen and carbon in dissolved carbon dioxide has been studied with the help of the Isotope Ratio Mass Spectrometer FinniganTM MAT 253 equipped with the attachments for sample preparation H/Device (to analyze the δD ratio) and GasBench II (to analyze δ18O and δ13СDIC ratios). There are two aquifers at the deposit. The first nonartesian aquifer comprises loose sediments of the Quaternary age. The second artesian aquifer includes the granites of the upper Paleozoic age with the different fracture degree: from monolith to loosened. Three groups of waters are distinguished on the basis of geochemical coefficients: fracture-vein waters bedded in weathered granites; groundwaters of the zone of rare earth mineralization and background composition; surface waters of the Belokurikha river. The isotope data on oxygen and hydrogen provide evidence that the production aquifers of the Belokurikha field are fed through the infiltration of meteoric waters, with the feeding shift to winter precipitation. The paper provides the first data of the integrated isotope-hydrogeochemical studies of nitric-siliceous low-radon thermal waters of the Belokurikha deposit. The composition of these waters is HCO3-SO4 Na and SO4-HCO3 Na with the total dissolved salts value ranging from 198 to 257 mg/dm3. The waters are characterized by alkaline pH of 8.6–9.6, silicon content ranging from 19.8 to 24.6 mg/dm3, and they are referred to the fracture-vein waters of the Upper Paleozoic granites. 222Rn activity is up to 359 Bq/dm3. The ratios of δD (from -126.9 to -102.7 ‰) and δ18O (from -17.5 to -14.2 ‰) in the studied waters indicate their atmospheric origin. The values of δ13СDIC vary from -9.7 to -25.6 ‰ and point to the biogenic origin of carbon.

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Isotope-hydrogeochemical features of the Belokurikha field radon waters

Хващевская¹,

Копылова²,

Novikov³

et al. 2021

jour

Self Cite

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Isotope Composition of Natural Waters in the Verkh-Tula Settlement (The Novosibirsk Region)

Pyrayev

Novikov

Dultsev

et al. 2021

Interexpo GEO-Siberia

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The first data obtained in the isotope hydrogeochemical studies of natural waters in the Verkh-Tula settlement are presented in the work. The composition of these waters is mainly HCO Na-Mg-Ca with TDS varying from 542 to 731 mg/dm, and silicon content 0.46 to 7.04 mg/dm. The geochemical parameters of the medium vary from reductive to oxidative with Eh -157.4 - +231, weakly alkaline pH (7,4 - 8,1) and О 0.29 - 5.52 mg/dm3. It was established that δD and δ18O of surface and ground waters differ from each other substantially and vary from -105 to -126 ‰ and from -13.2 to -16.3 ‰ - for the former, and from -136 to -138 ‰, from -18.3 to -18.8 ‰ - for the latter. According to the data obtained, for the majority of groundwaters, the time of water residence in the aquifer is not less than 5 years, and their feeding is independent of local surface waters. The isotope composition of water-dissolved carbon (δС from -14.3 to -12.5 ‰) points to the biogenic origin of carbon dioxide participating in carbonate-silicate weathering.

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Hydrogeological Conditions of the Novobibeevo Occurrence of Radon Waters (The Novosibirsk Region)

Dultsev

Novikov

Fage

et al. 2021

Interexpo GEO-Siberia

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The first results of integrated geophysical and hydrogeochemical studies of the Novobibeevo occurrence of radon waters are presented for the first time. The object under investigation is situated at the contact zone of Upper Paleozoic granitoids and Lower Carboniferous - Upper Devonian rocks. Water composition is mainly HCO Mg-Ca with TDS 496 - 877 mg/dm and silicon content 5,8 - 13,3 mg/dm. Substantial variations were detected in the parameters of the geochemical medium (pH 6.6 - 7.5, Eh -81.2 - +212.7 mV; O 1.6 - 7.9 mg/dm). Radionuclides in the waters are of natural origin; their concentrations are (mg/dm): U from 5.25∙10 to 0.13 and Th from 1.86∙10 to 2.43∙10. The Th/U ratio varies within the range 2.63∙10 to 2.92∙10, with the average value equal to 4.24∙10. The activity of Rn in the wells varies from 4.0 to 167.5 Bq/dm. The studied waters are prone to anthropogenic pollution.

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Geochemistry of the Water-Rock System of Weak Hydro-Radon Occurrence «inskiye Springs» (South of Western Siberia)

Cited by 3 publications

References 6 publications

Isotope-hydrogeochemical features of the Belokurikha field radon waters

Isotope-hydrogeochemical features of the Belokurikha field radon waters

Isotope Composition of Natural Waters in the Verkh-Tula Settlement (The Novosibirsk Region)

Hydrogeological Conditions of the Novobibeevo Occurrence of Radon Waters (The Novosibirsk Region)

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